Backlog: Rename 'deadline' to 'milepost'
Backlog: Rename 'deadline' to 'milepost'

'Deadline' is a bit rough. 'Milestone' was
also considered, but it is a bit corporate.

Eventually these jargon words should be editable
by the client.

holmwell/circle-blvd,ellipsonic/circle-blvd,secret-project/circle-blvd,secret-project/circle-blvd,holmwell/circle-blvd,ellipsonic/circle-blvd,holmwell/circle-blvd,myersg86/circle-blvd,ellipsonic/circle-blvd,ellipsonic/circle-blvd,myersg86/circle-blvd,secret-project/circle-blvd,holmwell/circle-blvd,myersg86/circle-blvd,secret-project/circle-blvd,myersg86/circle-blvd